diff --git a/pkgs/tools/misc/lolcat/default.nix b/pkgs/tools/misc/lolcat/default.nix
index 21355652d3e..21377d7bfa4 100644
--- a/pkgs/tools/misc/lolcat/default.nix
+++ b/pkgs/tools/misc/lolcat/default.nix
@@ -2,12 +2,10 @@
 , pkgconfig, which }:
 
 bundlerEnv {
-  name = "lolcat-42.1.0";
-
   inherit ruby;
-  gemfile = ./Gemfile;
-  lockfile = ./Gemfile.lock;
-  gemset = ./gemset.nix;
+
+  pname = "lolcat";
+  gemdir = ./.;
 
   meta = with lib; {
     description = "A rainbow version of cat";